Burner-controlling mechanism.



J. LEWS. BURNER CONTROLLING MECHANISM.v

APPLICATION FILED NOV. 29. 1916.

Ptented Jan. 8, l1918.

l. LEWIS..

BURNER CONTROLLINGA MECHANlSM.

APPLICATION FILED Nov. 29. 1916.

1,252,707. Patented Jan. 8,1918.

2 SHEETS-SHEET 2.

`mi?. E.

Gramm,

e nien JERRY LEV/'15, CF LITTLE] RQCK, ARKANSAS.

'Bunnniwenfrnenmne rancnanisiii.

applicati@ ined November T0 all whom it may concern.'

Be it known that I, JERRY Lnwis.a citi Zeli of the United States, residingr at Little Rock, in the county of Pulaski, State of scription, reference being had to the accoinpanying drawings, forming a part h The object of the invention is to prow. simple, relatively inexpensive and efficient mechanism adapted to be applied as an attachment to any ordinary valve head of standard type and having means whereby a relative and regulable supply of gas or other fluidfuel and air or other combustion supporting agent may be supplied either auto matically, under the control, for example, of steam pressure as when the device is used in connection with a steam boiler furnace, or manually and, if preferred, the adjustment of the mechanism to vary the relations of supply between the fuel and the combustion supporting agent and to provide for eitherautomatic or manual operation, may be effected with facility.

Further objects and advantages of the invention will appear in the following' deseription of a preferred embodiment, it heing understood that changes in the form, proportion and minor details may he resorted to within the scope of the appended claims without departing from the spirit of the invention.

In'the drawings,

Figure 1 is an elevation partly in section of a mechanism showing one embodiment of the invention.

Fig. 2 iS an elevation of the saine viewingr the mechanism in a plane at right angles to that of Fi". l.

Fig. 3 is a plan view.

Fig. 4 is a plan View showing' an adjustment of the mechanism adapting it for inanual operation.

Fie. 5 is an elevation of the upper portion of the mechanism as shown in Fig. 4l.

Fig. 6 is a detail sectional view shewing the fuel control valve.

1n the illustrated mechanism, the head i0 may'loe of the ordinary` or well known vconstruction provided with a fuel controlyling valve 1l and a nozzle or feed pipe l2 Specification of Letters Eate'nt.

Patented Jaen.. t5, llhficl.

29. ltltl. Serial No. 134.217.

and arins lvl supporting the saine in proper relation to the fuel opening` l5 of the furnace, said fuel opening' being' shown of coni al or inwardly7 tapered forni to provide for a graduated control of the air inlet formed l y the space between the fuel nozzle and the opcuing in the furnace wall for cooperation with an air cut-ofi' consisting; of a disk 16 which is slidaloly mounted upon said nozzle or pipe l2.

onnectinn the axis 17 of the fuel valve with the air eut-olf disk is a crank 18 and a link ll), whereby as the fuel valve is turned to increase or diminish the flow of fuel, the air cutoff disk is moved outwardly or in vardljv with reference to the air supply space to vary thc admission of air proportionately to that of the fuel. The actuation of the fuel valve may he accomplished manually as through the agency nl a handle or lever 20 connected in any suitable manner with the spindle of i'he fuel valve. or automatically under the influence of steam pressure in the boiler when the mechanisni is used in con# nection with a steam holler furnace, a steam connection 2i being established between the strain boiler (not shown) and a cylinder 22 secured as by a clip or an equivalent thereof to the valve head and containing a piston 2l-v;zi.i'1ied by a stern which is weighted as at 26 to provide for the depression of the piston and stem when the steam pressure below 'the former decreases. The connection between the piston stem and the fuel feed valve consists essentially of a rack 27 carried Lby the stem and engaging a segment 28 secured fo the valve and 'preferably formed as a part -of the crank arm i8, an adjustable connection 'being established between said segment or crank arm element and the valve. handle 2O may secured by means of a set screw engaging a slot 30 to provide for varying the relation between the fuel. valve and the air cnt-olf disk to secure a relative 'supply of fuel and air or other comloustion'supporting agent which will result in the most cffcctiv.: and economical combustion. of the fuel.

in the construe-tion illustrated, the rack 27 is formed as extension, (either integral or otherwise rigid) of the stem 25 and passes through a guide 3l, said rack being :flexible and the guide being of sacient dimensions to permit of the flexing of the raciti@ as indi-cated. by the dotted. linea 5, to disengage the teeth of the rack from those ofthe segment, and pivotally mounted on the guide and cooperating therewith is'a holding element which when in the 5 position indicated in Fig. l holds the rack 15, control disk vmay be turned to the yWith its 'teeth inepositive engagement with those 'of the segment. Said holding element is pivotally ounted to permit of its being deflected, as lshown in Fig. el, to allow o of the disengagement oi the rack from the 2e the former may be provided with a butterfly finger hold 33. `lso to permit of drain age of the cylinder, a. valve outlet 34 may be provided.

ln practice a relative adjustment of the 25 crank arm 18 and the valve il, through the agency ot' the set screw 29 and slot 30 Should be eeeted to seeure a supply or air pr0- .portioned to the suppl'i of fuel to obtain a flame indicating comp ete combustion, after Se which the raek may be engaged with the segment With the fuel and air vcontrol ele- 'A ments in position to supply-'the fue] and air in the required volume to maintain the neoetssary temperature or steam pressure 1n the 3o boiler, after which any reduction' oi? the steam pressure will result, through the decrease of pressure 1n the lower end ot' the cylinder 22 and the etl'ect of the weight 26,- in depressing the plston stem and the in? 4o crease in. the supply et fuel and combustion supporting agent; whereas an increase in. the boiler steam pressure will result in the cutting oli' ,in part of the fuel and the air supply, to the end that a normal and uniet?" form pressure of steam in the boiler may.

be maintained automatically.

What l claim is l. The combination with a fuel supply vulve and a. out-olin for combustion supporte ing agent, of operating connections between said elements for securingf proportional movement thereof, and means for operating the valve including a toothed segment secured thereto, a rack for engagement with said segment, manually displaceable means for normally holding the rack in engage nient with the segment," and steam pressure actuated means for operating the rack.

2. The combination with a fuel supply valve and a cut-.oil for Combustion supporting agent, of operating connections between said elements for securing proportional movement thereof, and means tor actuating the valve including a toothed segment secured thereto, a displaceable rack for engagement with said segment, a manually operated movable holder for maintaining the rack normal in engagement with the segment, and steam pressure aetuated devices 'for operating the rack.

3. The combination with a fuel supply valve and a cutoff for combustion supporting` agent, ot' operating connections between said elements for securing proportional movement thereof, and means for actuating the valve including a toothed segment secured thereto, a rack for engagement with the segme1'1t,.a guide for the rack in which the latter is movable for disengagement from the segment, a manually operated pvotal rack holder for normally retaining the rack in engagement with the Segment, and steam pressure controlled devices for aotuatlng the segment.

el. rlfhe combination with a fuel supply valve and a cutoff for combustion supporting agent, of operatingl connections between said elements for securing proportional movement thereof, and means for actu-ao.

ing the vulve including u segment` carried thereby, a rack for engagement with the segment, a piston exposed to boiler steam pressure and having a stem carrying said rack, and manually operated removable iin-ans for nornmlly maintaining the rack in engagement with the segment.

This speeilieation signed and witnessed this 24th day of November. A. D. 1916.

' JERRY LEWKS. ln the presence of* W. R. CRAWFORD, Vv. H. Dwiooans.

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